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A novel radial self-rectifying air turbine for use in wave energy converters

Falcão, A.F.O.; Gato, L.M.C.; Nunes, E.P.A.S. - In: Renewable Energy 50 (2013) C, pp. 289-298

The flow through the air turbine of an oscillating water column (OWC) wave energy converter is reciprocating and is random and highly variable. It is not surprising that the time-averaged efficiency of the air turbine is substantially lower than that of a conventional turbine working in nearly...

Persistent link: https://www.econbiz.de/10010806136

Modeling and scaling of the impulse turbine for wave power applications

Thakker, Ajit; Hourigan, Fergal - In: Renewable Energy 29 (2004) 3, pp. 305-317

This paper addresses the dimensional analysis of experimental data for the impulse turbine and the use of that data to create a model to predict the performance characteristics of any size of turbine under a range operating conditions. The model assumes that the performance of the turbine is a...

Persistent link: https://www.econbiz.de/10010806216

A twin unidirectional impulse turbine topology for OWC based wave energy plants

Jayashankar, V.; Anand, S.; Geetha, T.; Santhakumar, S.; … - In: Renewable Energy 34 (2009) 3, pp. 692-698

Experimental results from near shore bottom standing OWC based wave energy plants in Japan and India have now been available for about a decade. Historically the weakest link in the conversion efficiency of OWC based wave energy plants built so far has been the bidirectional turbine. This is...

Persistent link: https://www.econbiz.de/10010807027

Computational fluid dynamics analysis of a 0.6m, 0.6 hub-to-tip ratio impulse turbine with fixed guide vanes

Thakker, Ajit; Hourigan, Fergal - In: Renewable Energy 30 (2005) 9, pp. 1387-1399

This paper presents the comparison of a three-dimensional Computational Fluid Dynamics (CFD) analysis with empirical performance data of a 0.6m Impulse Turbine with Fixed Guide Vanes used for wave energy power conversion. Pro-Engineer, Gambit and Fluent 6 were used to create a 3-D model of the...

Persistent link: https://www.econbiz.de/10010807084

Computed effects of tip clearance on performance of impulse turbine for wave energy conversion

Thakker, A.; Dhanasekaran, T.S. - In: Renewable Energy 29 (2004) 4, pp. 529-547

This paper depicts numerical analysis on Impulse turbine with fixed guide vanes for wave energy conversion. From the previous investigations, it is found that one of the reasons for the mismatch between computed and experimental data is due to neglecting tip clearance ef fect. Hence, a 3-D model...

Persistent link: https://www.econbiz.de/10010804546

Design charts for impulse turbine wave energy extraction using experimental data

Thakker, A.; Jarvis, J.; Sahed, A. - In: Renewable Energy 34 (2009) 10, pp. 2264-2270

This study presents newly developed charts to aid in early design of impulse turbine for wave energy extraction. These charts, based on the available experimental data, represent a simple approach to the performance evaluation of the turbine. The novel approach is applied in a case study that...

Persistent link: https://www.econbiz.de/10011045916

Multiple surrogate based optimization of a bidirectional impulse turbine for wave energy conversion

Badhurshah, Rameez; Samad, Abdus - In: Renewable Energy 74 (2015) C, pp. 749-760

Oscillating water column based wave energy extracting system has a low efficiency due to the poor performance of its principal power extracting component, the bidirectional turbine. In the present work, flow over a bidirectional impulse turbine was simulated using CFD technique and optimized...

Persistent link: https://www.econbiz.de/10011076854

Performance evaluation of a direct drive wave energy converter using CFD

Zullah, Mohammed Asid; Lee, Young-Ho - In: Renewable Energy 49 (2013) C, pp. 237-241

turbine. The flow is assumed to be two-dimensional (2D), viscous, turbulent and unsteady. The commercial CFD code is used with …

Persistent link: https://www.econbiz.de/10010804510

Numerical simulation of an oscillating water column device using a code based on Navier–Stokes equations

Teixeira, Paulo R.F.; Davyt, Djavan P.; Didier, Eric; … - In: Energy 61 (2013) C, pp. 513-530

The study of ways of converting ocean wave energy into a useful one and the improvement of the existing equipment are complex engineering problems and very important issues in today's society. In this paper, the onshore oscillating water column device, in a 10 m deep channel subjected to 1 m...

Persistent link: https://www.econbiz.de/10011054162

Construction heuristics for two-dimensional irregular shape bin packing with guillotine constraints

Han, Wei; Bennell, Julia A.; Zhao, Xiaozhou; Song, Xiang - In: European Journal of Operational Research 230 (2013) 3, pp. 495-504

The paper examines a new problem in the irregular packing literature that has many applications in industry: two …-dimensional irregular (convex) bin packing with guillotine constraints. Due to the cutting process of certain materials, cuts are restricted …. This paper aims to generate guillotine-cutting layouts of irregular shapes using a number of strategies. The investigation …

Persistent link: https://www.econbiz.de/10010679126

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